Output at fault
The current and voltage outputs can be set to take on distinctive values if the self-
monitoring circuit of the Silometer FMC 671 Z/676 Z transmitter triggers on finding a fault.
The relays follow the analogue output when the value "1" is entered at field V1H3 or V1H8.
The choice is made at V0H7, whereby:
•
0 =
–10% of the measuring range
•
1 =
+110% of the measuring range
•
2 =
last value is recorded
Proceed as follows:
Step Matrix Entry Significance
1
V0H7
e.g. 0
In the event of a fault, display falls to –10%
2 -
»E« Registers
entry
Caution!
•
Selecting option 2 effectively disables any fault recognition safeguards on the
analogue lines. Although the self-checking system functions, the alarm relay trips
and the red alarm LED lights on the transmitter, all analogue devices connected to
the Silometer as well as the measured values passed over the Rackbus appear to
indicate correct measurements.
Silometer FMC 671 Z/676 Z
Chapter 6: Analogue Outputs
35
Summary of Contents for silometer FMC 671 Z
Page 63: ...Silometer FMC 671 Z 676 Z...
Page 66: ...Silometer FMC 671 Z 676 Z...
Page 67: ...Silometer FMC 671 Z 676 Z...